Improvement in blast-furnaces



3 Sheets-Sheet 1. F. BU'TTGENBAGH.

BIast-Furnaces- No. 144,829. Patemednowzmlvs.

3 Sheets--Sheet2. F. BUTTGENBACH.

Blast-Furnaces.

FAQZ. Patented Nov. 25,1873.

4 3SheetsSheet3. F. BUTTGENBACH.

Blast-Furnaces. N01 144,829. i Patented Noy.25,1873.

, improved furnace.

UNITED STATES ERANZ RTTGENBAGH, 0E HEERDT DSSELDORF, GERMANY.

' IMPROVEMENT IN BLAST-FURNACES.

Specification forming part of Letters Patent No.144,829, dated November25, 1873; application filed May 5, 1873.

panying drawing, in which- Figure 1 is a vertical central sect-ion of myFig. 2 shows the boshes and parts connected therewith, partly inelevation and partly in vertical sect-ion, drawn to an enlarged scale.Fig. 3 is partly a plan and partly a horizontal section of the saidfurnace. Fig. 4 is a vertical section, illustrating variousmodifications of the same.

Like letters indicate the same parts throughout the drawing.

In the furnace illustrated in Figs. 1,- 2, and 8, the body or stack a ismade distinct from the boshes b, the latter being supported by a ring ofbrick-work, c, carried by brick piers (1,.

which have arches turned between them. The stack c is a single ring offire-bricks or fireclay blocks, which, if desired, may be strengtheriedby wrought-iron hooping. The boshes b are built up to join the stack, asshown in Fig.

1, and they are fitted with water blocks e at suitable intervals. blycast of the same form as the tuyeres, and ot' lphosphor bronze. They arekept cool by a current of water. The holes in which these water blocksor boxes are inserted are similar to those provided for the insertion ofthe ordinary tuyeres; and in the event of an accumulation in the hearthof the furnace, the ordinaryl tuyeres may be removed and inserted in theplace of the lower range of water-boxes. The purpose of thesewater-boxes is to assist in preserving the internal shape of thefurnace; and the said boxes may be advantageously applied to old or wornfurnaces, the boxes being then inserted in the work-places, and pushedinward as the sid es of the furnace are increased These blocks areprefera-v in thickness by the accumulation of slag due to the coolingaction of the boxes.

In Fig. l the stack a is shown provided with apparatus for taking thegases from the center of the mouth. The gases which are collected bythis apparatus or otherwise from the stack are, accordin g to myinvention, conducted down through gas-tubes g, communicating at theirlower ends with an annular main, h, which surrounds the base of thestack a, as shown in Fig. l. This main is so constructed that on oneside (preferably the outer side) it is not closed, except by a hydraulicjoint, as shown at h. The main 7L being partially iilled with water,this joint is perfectly sealed, so that under ordinary circumstances nogas can escape therefrom; but at the same time the joint gives immediaterelief if an explosion in the gastubes should occur; and it allows thedust which may accumulate at the bottom of the said main to be readilyremoved at any time without an escape of gas. The mains leading from thefurnace to the boilers or stoves when the gases are utilized may also besimilarly constructed.

In they furnace shown in Fig. 1 the platform or staging at the mouth ofthe furnace is supported by the gas-tubes g, the stack being thus leftperfectly free to expand or contract; and the said stack may, ifnecessary, be partially or wholly removed and replaced wlthoutinterfering with the platform. This improved furnace has a closedbreast, formed by inserting a cast-iron plate, t', wherein is cast awroughtiron pipe, through which water is caused to circulate. The platet' has a narrow slot extending the greater part of its height, as'shown.The edges of this slot are protected by the said water-pipe, which isembedded in the plate parallel to the said edges, as shown by the dottedlines. When the furnace is working, the aforesaid slot is filled withclay, and the slag is drawn off at any desired level by perforating thisclay with an iron rod, or in any other convenient manner. rlhe spacebetween the plate i and the dani-plate j is filled .in with loam, whichis capable of ready removal in the event of the furnace requiring to beworked with bars. The iron is drawn off at 7c, in the usual manner.

In Fig. 4, the stack a is supported by cast- With the tuyeres, andinterchangeable with the iron standards l, instead of by brick piers.saine, as and for the purpose described. The top of the stack et isfitted With a bell and 2. The combination of the east-iron plate z',hopper, and the gases are taken off from the constructed as described,with the dam-plate sides. In this case the short horizontal tubes j, asset forth. y', which connect the stack With the main gas- 3. The uppergallery or platform of a blasttubes g, are made With expansion joints,as furnace, supported either entirely or partially shown, doors beingprovided for cleaning these by the down-come77 gas pipes or mains g;

horizontal tubes, When necessary. Witnesses: FR. BTTGENBAGH.

I claim- A. GLATZEL, l. The Water-blocks e, corresponding in form M.MLLER.

